Campaigners are already fighting for California's independence and a "Calexit" referendum, initially inspired by Catalonia independence attempts, to be held in 2019.

More than 60 per cent of voters opted for Hillary Clinton in The Golden State - the election's bluest patch.

The Yes California Independence Campaign says: On issues ranging from peace and security to natural resources and the environment, it has become increasingly true that California would be better off as an independent country."

Douglas Cole from Beaverton, Oregon, wrote an ironic open letter on the subject to Canada, asking: "Just please take us. Pretty please?"

The Independent has contacted the office of Prime Minister Justin Trudeau and the Liberal Party of Canada for comment.